The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2002
Filed:
Feb. 12, 2001
John Talbot Boys, Auckland, NZ;
Andrew William Green, Auckland, NZ;
Auckland UniServices Limited, Auckland, NZ;
Abstract
An inductively powered lamp unit is fixed onto a substrate and over a position where a primary inductive loop is spread apart (as at ). At such sites, a horizontal (or at least parallel to the surface of the substrate) component of alternating magnetic flux is available. The conductors of the loop can be inserted in a slit cut into the substrate. The spreading apart of the conductors may be ensured with a spreader . A power supply may be a resonant supply operating at 40 kHz. The lamp unit does use a resonant pickup coil which can be shorted so as to minimize coupling, and provide supply regulation. The lamp unit can be controlled by signals transmitted over the primary loop. Applications include roadway markers and fire escape egress indicators, and underwater lighting.